Regulator system



Sept. 15, 1925 1,554,174

J. H. ASHBAUGH REGULATOR SYSTEM Filed Marh 30, 1921 INVENTOR WITNESSES:

Patented Sept. 15, 1925.

UNITED STATES PATENT OFFICE.

JOHN H. ASHBAUGH, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO WESTING-HOUSE ELECTRIC & MANUFACTURING COMTANY,' A CORPORATION OF PENNSYL-VANIA.

REGULATOR SYSTEM.

Application filed March .30', ,1921., 8eri al,No. 456,797.

To all whom it may concern.

Be it known that I, JOHN H. Asrmauon, a citizen of the United-States,and a resi dent of \Vilkinsburg. in the county of Allegheny and State ofPennsylvania, have in- -vented a new and useful Improvement in RegulatorSystems, of which the. following is a specification. z

My invention relates to electric regulator systems and has specialrelation to such systems for maintaining substantially-eonstant voltageupon supply circuits.

One object of my invention is to provid a. regulator system that shall.be: quickly.

responsive to correct changes of voltage upon the supply circuitand beoperativeover a wider range of voltage changes than has heretofore beenpossible in regulators of this type.

Another object of my invention is to pro ride a regulator system of theabove-rude,

cated character that shall embody means for effecting a preliminary orrough ad ustment of the excitation of a dynamo-electric ma- '7 chine andother means for obtaining a final or minute adjustment of suchexcitation,

and shall include means for extending the operating range of theseregulating means.

A system of this general class is illustrated and described in theapplication of H. A. Travers, Serial No. 254,207, filed Sept. 16. 1918.In brief, the system illustrated there'in comprises analternating-current generator or a synchronous condenser, which isconnected to a supply circuit, and the field-magnet winding of whichisexcited by means of an auxiliary generator. A vibrating contact type ofregulator, such as the well-known Tirrill regulator, is provided foradjusting the voltage of the exeitcr in accordance with thesupply-circuit voltage. A motor-operated rheostat is connected incircuit with the field-magnet winding of the controlled machine, whichis adjusted in accordance with the variations in the excitcr voltage. Inorderto extend the range of operation of these regulating mediums. aresistor is included .in circuit with the operating winding of theswitch for governing the energization of the rheostat motor, whichresistor is shorteircuited by means also connected across the terminalsof the field-magnet winding of the main machine.

In the system of the present application,

, .themea'ns for extending the range'of operation of the regulatorscompr ses an, electromagnet connected in parallel relation with theenerg zing jwi'ndings of the operating relays of .the vibratoryregulator. each of which windings is connectedto h. euergized by theexciter voltage. :the efl'ectivewalue of theresistor n circuit IAccordingly.

with 'the switch operating coil controlling theenergizationof therheostat motor is regulated n by a vibratory electromagnet which, finturn, is controlled by variations in the supply-circuit voltage andenergized 1n accordance w th the exeiter voltagc.

Referring to the drawing, the single fig- .ure 1s a, diagrammaticillustration of the circuitsand apparatus embed 'ing my invention. I

A mainigenei'atfi 1, having an .armature .2 and a field-magnet winding3, is connectedto, supply. conductors}, band 6.

Fieldsmagnet winding 3 is adapted-i0 be energized. by -an auxiliary,exciter generator havingan armature Sand a field-magnet winding 9. ,Incircuit with the field-magnet 'winding 9 isan adjustable resistor 11.

Connected in circuit between the exciter 7 and the field-magnet winding3 is a motoroperated-rheostat 12, comprising resistor 13 and pilot-motor14, .which operates worm gear mechanism 15 to control the movement of arheostat arm 16. The energization of the pilot mote; 14.- is eontrolledba reversing switch"17, comprising swite i members 18 that are connectedto a lever 19, upon the opposite ends of which are core armatures 21 and22, respectively. Operating windings 23 and 24, .respectively cooperatewith the core armatures to move the switch' members 18 into engagementwith the one or the other set of co-operating contact terminals tooperate the pilot motor 14 in the one direction or the other. The ener-'gization of the electromagnet windings 23 energized. the lever 19 ismaintained in a middle or neutral position by springs attached to theends thereof.

Attached to the lever 26 is a core armature 29 that is adapted to beoperated by a winding 31, which is connected across the field-magnetwinding 3. so as to be operated in accordance with 'the variations inthe excitation thereof. -Included in circuit with the coil 31 is aresistor 32. The control of the shunt circuit for this resistor will behereinafter described.

The foregoing apparatus accomplishes what may be termed the rough orpreliminary regulation of the excitation of the field winding of themain machine, in accordance with its variations, to maintain asubstantially constant supplv-circuit voltage.

The herein illustrated system also in cludes a re lator adapted toaccomplish the more minute regulation of such excitation. Such aregulator is herein designated by the reference character 33 and is ofthe well-known vibratory or Tirrill type. As is customary in this typeof regulator, the main control magnet 34 is energized 'in ac cordancewith the supply-circuit voltage by means of a transformer 35. A secondcontrol magnet 36, adapted to insure the vibratory action of theregulator, is likewise energized in accordance with the supply-circuitvoltage and has a resistor 37 in circuit therewith. The main contactmembers 38 control the circuit to operating relays 41 and 42 which areconnected across the terminals of the exciter machine 7. Relay 42controls the shunt circuit around the resistor 37, which is in circuitwith the vibratory magnet 36. Relay 41 controls a shunt circuit aboutthe resistor 11, which is in circuit with the exciter fieldmag'netwinding 9. Accordingly, variations in supply-circuit voltage will causethe resistors 11 and 37 to be respectively short-circuited in a mannerto effect the necessary correction. Inasmuch as the operation of thisapparatus is well known, no detailed reference will be made thereto.

The present invention. contemplates connecting in parallel relation tothe relays 41 and 42 the winding 43 of an electromagnet 44. The contactmembers 45 of this electromagnet control the shunt circuit for theresistor 32, which is in circuit with winding 31 of switch mechanism 25.

From the preceding description, it will be apparent that variations inthe field excitation of field-magnet winding 3 will vary theenergization of winding 31 to move reversing switch 17 to operate thepilot motor 14 in one direction or the other to move the rheostat arm 16so as to compensate for such variation. At the same time, the regulator33, will vary the operation of the exciter machine to maintain thegenerated voltage substantially constant, in accordance with theelectrical condition of the supply circuit.

Since the regulator 33 vibrates, the relays 41 and 42 will have avibratory action; and. since the coil of electromagnet 44 is suhjert tothe same control as relays 4! and 42. it-

likewise will have a vibratory action. Accordingly, the mean efi'ectivevalue of the resistor 32 in circuit with the coil 31. is controlled inaccordance with the vibrations of the elcctromagnet 44. In addition. thewindings of relays 41 and 42 and electroinagnet 4-4 being connectedacross the exciter armature. they are energized in accordance withvariations in the excitation of the main field-magnet winding.

Accordingly, the ultimate efiective value of the resistor 32. in circuitwith winding 31 of switch mechanism 25, will change inaccordance withexciter variations. By reason of the fact that electromagnet 44 is aninverted magnet, that is to say, having its contact members normallyclosed variations in the value of the resistor 32 will be at an inverseratio to the variations of. the exciter voltage. 1

It will thus be-apparent that the range of operation of switch mechanism25 and. hence, the regulation controlled thereby. will be extended overa range which is unlimited by the action of a magnet set to respond onlyat a predetermined voltage, since such range is herein controlled by thevibratory magnet 44.

Not only will the operative range of this regulating mechanism beextended, but the range of operation of thevibratory regulator will alsobe extended. That is, should the exciter voltage become so low that thecoils of relays 41 and 42 and electromagnet 44 will have insufiicientenergization to operate their respective armatures, the resistor 32 willbe shunted and, hence. switch 25 will have a different setting. Thisaction will operate the pilot motor to change. the resistance of theexciter circuit. Hence. the. coils of the relays and clectromagnet willagain be energized and the vibratory regulator will also be operativeover the new range.

Modifications in the system and arrangement and location of parts may hemade within the spirit and scope of my invention, and such modificationsare intended to be covered by the appended claims.

I claim as my invention 1. The combination with a synchronous condenserconnected to an alternating-current supply circuit. an exciter generatorfor energizing the condenser field winding. and having an armature and afield-magnet winding. and a motor-operated rheostat connected in seriesrelation with the generator. of means comprising an electronlagnetmntrolled .in accordance with the potential of the condenser fieldwinding for operating said rheostat. and another elvctromagm-t adaptedto increase the operating range of the. first-mentioned electromagnet.said second clcctromagnet being vibrated in accordance with thevariations in the supply circuit.

2. The combination with a d \-'n:nno-electric machine connected to analternatingcurrent supply circuit, an exciter generator having anarmature and a motor-operated rheostat connected in circuit with thegenerator, of means comprising an electromagnct adapted to control the oration of said rheostat, and vibratory e ectroresponsiv'e means adaptedto extend the range of operation of said electromagnet.

The combination with a dynamo-electric machine 'to be regulated havingan armature and a field-magnet winding, an exciter generator in circuitwith said fieldmagnet winding and a motor'operated rheostat in circuittherewith, of means for controlling said rheostat and vibratory meansfor extending the rangeof operation of said controlling means. I

it. The combination with aldynamo-electric. machine tobe regulatedhaving an armature and a field-magnet winding, an exciter generator incircuit with said fieldmagnet. winding and a motor-operated rheostat incircuit therewith. of electroresponsive means for controlling saidrhcostat and vibratory means for extending the range of operation ofsaid electroresponsivc means.

5. The combination with a dynamo-electric machine to be regulated havingan armature and a field-magnet winding, an exciter generator in circuitwith said fieldmagnet winding and a motor-operated rheostat in circuittherewith, of vibratory electroresponsive means for controlling saidrheostat and vibratory means for extending the range of operation ofsaid electroresponsive means.

6. The combination with a supply circuithaving connected thereto adynamo-electric machine to be regulated having an armature and afield-magnet winding, an exciter generator in circuit with saidfield-magnet winding and a motor-operated rheostat in circuit therewith,of vibratory elcctroresponsive means for controlling said rheostat andvibratory means for extending the range of operation of saidelectroresponsive means controlled in accordance with the supplycircuitvoltage.

7. The combination with a dynamoelectric machine connected to analternatingcurrcnt supply circuit. an exciter generator for energizingthe machine field-magnet. winding. and means for varying the excitationof said field-magnet winding, of means for controlling the excitation ofsaid fieldlnagnct winding in accordance with the potcntial impressedupon said field-magnet winding. comprising means adapted to operatewithin predetermined limits, and

)i-ess ed upon said field-magnet winding and ada )ted to operate withinpredetermined limits, and vibratory means adapted to increase theoperating range of the first-mentioned' means.

9. The combination with a dynamo-electric machine connected to analternatingcurrent supply circuit, an exciter generator for energizingthe -machine field-magnet winding, and means for varying the excitationof said field-magnet winding, of means for controlling the excitation ofsaid fieldmagnet winding comprising clectroresponsive means controlledby the potential impressed upon said field-magnet winding and adapted tooperate within predetermined limits, and vibratory electroresponsivcmeans adapted to increase the operating range of the first-mentionedmeans.

10. The combination with a dynamo-electric machine connected to analternatingcurrent supply circuit, an excite-r generator for energizingthe machine field-magnet winding, and means for varying the excitationof said field-magnet winding, of means for controlling the excitation ofsaid fieldmagnet winding comprising electrorcsponsive means coptrolledby the potential impressed upon sairPfield-magnet winding and ada ted tooperate within predetermined limits, and vibratory electroresponsivemeans adapted to incrcase the operating range of the first-mentionedmeans controlled in accordance with supply-circuit voltage.

11. The combination with a dynamoelectric machine. connected to a supplycircuit, an exciter generator for energizing the field winding of saidmachine, a resistor disposed in the circuit of the machine field windmgand the excite! generator, and means comprising a motor for controllingsaid rcsistor in accordance with the potential impressed across themachine field winding to permit the exciter generator to opt-rate withinpredetermined limits of switching means for governing the rotation ofthe motor in a forward and in a reverse direcrange of said switchingmeans, and vibratory means for extending the range of operation of saidfirst-mentioned means.

12. The combination with a dynamo-eke li rst ancntioncd .tion, means forincreasing the operatin tric machine connected to a supply circuit, anexcite-r generator for energizing the field windin of said l'uachinc, aresistor disposed in the circuitof the machine iicld winding and theescite'r generator, and means coniprisinga motor for controlling saidresistor in accordance with the potential impressed acrosstlie' niachinefield winding to permit the cxeiter generator to operate withinpredetermined limits, of switching means for governing the rotation ofthe motor in a forward and in a reverse direction, and vibratory meansfor increasing the operating range of said switching means, and meansfor also governing the exciter voltage in accordance with the voltageobtaining in. the supply circuit. 1

13. The combination with a dynamo-electric machine connected to a su)ply circuit, an exciter generator for energizing the field winding ofsaid machine, a resistor disposed in the circuit of the machinefield-magnet winding and the exciter generator, and means comprising amotor for controlling said resistor in accordance with the poten-.

tial impressed across the machine field-magnet winding to rmit theexciter generator to operate within predetermined limits, of switchingmeans for governing the rotation of the motor in a forward and in areverse direction, and vibratory electroresponsive means for increasingthe operating range of said switching means, and means for alsogoverning the exciter voltage in accordance with the voltage obtainingin the supply circuit.

14. The combinationwith a synchronous condenser connected to analternating-cur rent. supply circuit, an exciter generator having anarmature and a field winding for energizing the condenser field-magnetwinding, a resistor in circuit with the generator field-magnet winding,a rheostat connected in series relation with the generator armature, anda motor for operating said rheo stat, of means comprising anelectromagnet controlled by the potential impressed across the condenserfield-magnet winding for operating said rheostat motor. a resistanceelement in the energizing circuit of said electroiuagnet, vibratorymeans for controlling said element and means associated with saidresistor for varying the excitation of the gen- -crator in accordancewith the voltage obtaining in the supply circuit.

15. The combination with a synchronous condenser connected to analtcrmiting-currcnt supply circuit, an cxcitcr generator having anarmature and a field-magnet winding tor energizing the condenserfieldnlagnet winding. a resistor in circuit with the generator ficldmagnet winding. a rheo stat. connected in series relation with thegenerator armatur, and a motor for operating said rheostat, of meanscomprising an clcctromagnet controlled by the potential iu'ipressedacross the condenser tield-magnei winding for operating said rheostatmotm', a resistance element in the energizing circuit of saidelcctromagnet, vibratory electroresponsive means for controlling saidele ment and means associated with said resistor for varying theexcitation of the generator in accordance with the voltage obtaining inthe supply circuit.

16. The combination with a synchronous condenser connected across asupply circuit. an exciter generator having an armature and afield-magnet winding for energizing the. condenser field-magnet winding,and a motor-operated rheostat disposed in series relation with thegenerator armature and the condenser field-magnet winding, of meanscomprising an electromagnet connected across the condenser field magnctwinding for operating said rheostat in ac cordance with variations inpotential of the condenser field-magnet winding, a resistance element.in the energizing circuit of said electromagnet, vibratory means forcontrolling said element, and means for varying the excitation of thegenerator in accordance with the voltage obtaining in the supplycircuit.

17. The combination with a synchronous condenser connected across asupply circuit, an exciter generator having an armature and afield-magnet winding for energizing the condenser field-magnet winding,and a motor-operated rheostat disposed in series relation with thegenerator armature and the condenser field-magnet winding, of meanscomprising an electromagnet connected across the condenser field-magnet.winding for operating said rheostat in accordance with variations in thepotential of the condenser field-magnet winding, a resistance element inthe energizing circuit of said eleetromagnet, vibratoryelectrorcsponsive means for controlling said element, and means forvarying the excitation of the generatorin accordance with the voltageobtaining in the supply circuit.

13. The combination with a dvnamo-eksctric machine to be regulatedhaving means associated therewith for accomplishing a preliminaryregulation of said machine, and other means adapted to accomplish thefurther regulation of said machine. of vibratory means for determiningthe range of operation of one of said regulating moans.

l The combination with a dynamo-( e tric machine to be regulated havingmcans. associated therewith for accon'lplishin; a preliminary regulationof said ll11l('llil\t and vibratory means adapted to ac omplish afurther regulation of said I11:l(llil!(.0f means controlled by saidvibratory means for extending the range of operation of one of saidregulating means.

20. The combination with a supply circuit having connected thereto .adynamo-electric machine to be regulated having-fan armature and afield-magnet winding, means con trolled inv accordance with thepotential of the field-magnet winding for accomplishing means.

21, The combination witha sunnlycircuit. having connected thereto adynamo-electr c machine to be regulated having aniarmature and .afield-magnet winding, meanscon tric machine. to. be regulated-havingmeans associated. therewith., for accomplishing-Ha preliminary ,regulationveof said=i -machine, 1

trolledin accordance with the potential of the lield-magnet \'inding foraccomplishing the preliminary regulation of said machine and vibratorymeans controlled in .accordance. with supply-c rcuit, voltage adapted,to

accomplish a further regulation, of said machine, of meanscontrolled bysaid ,vibratory; means forextendingll e rangeoi operation tr cmaclrinetonbe regulatedihaving. means s iat d v t erewi h for.accomplishing a.

of the preliminaryregulator,

22. The combination with asupply, circuit having connected theretoadynamo-electric Vmachine to be regulated .havmg means associatedtherewith for; accomplishing a ,pre-

liminary regulation of said machine, saidmeans comprising anelectroresponsive device ;having a resistor in, circuit therewith, andsecond means adapted to accomplish a further regulation of said machine,of vibratory means controlled by said sec'ond regulating means forcontrolling said resistor to extend the range of operation of said firstregulating means.

23. The combination with a supply circuit having connected thereto adynamo-electric machine to be regulated having an armature and afield-ma net winding, means controlled in accor ance with the potentialof the field-magnet winding for accomplishing the preliminary regulationof said machine, said means comprising an electroresponsive devicehaving a resistor in circuit therewith, and second means controlled inaccordance with supply-circuit voltage adapted to accomplish a furtherregulation of said machine, of vibratory means controlled by said secondregulating means for controlling said resistor to extend the range ofoperation of said first regulatin means.

'24. The combination wit a supply circuit having connected thereto adynamo-electric machine to lie regulated having an armature and afield-magnet winding, means controlled in accordance with the potentialof (he field-magnet winding for accomplishing the preliminary regulationof said machine.

and means controlled in accordance with.

the supply-circuit voltage adapted to accomplish a further regulation ofsaid machine, of vibratory means for determining the range of: operationof one of said regulating means.

25. i The combinationwith a supply circuit having connected thereto adynamo-electric machine to be regulated having-anarmature and afield-magnet, winding,;.-means controlled; in accordance-withtheipotential of the field-magnet winding ;for accomplishing thepreliminary. regulation :of said-machine; and ;vibrator y,. meanscontrolled. inaccord-. ance, with .sup ly-circuit yoltageadapted toaccomplish a: iurther, regulationof said -1n.a

chine, of means-controlled ,bysaid vibratory means fordeterminingthe-Jange.=of .operation of the preliminary, regulator.

26. The v(annbinatiot1. with a -dynamo-elec-.

and other. means adapted; to. accomplish the further regulation of said.machine, of vibratory; means for determining the 4 range of per n. airegulatingimeans- 22'. The combination, with, a dynamo-elecpreliminary,regulation gOf; said ,machine and vibratory means adapted. to. .ac;comlish 1a further regulationof fsaid machine, .o means trolled inaccordance with the potential of the field-magnet winding foraccomplishing the preliminary regulation of said machine, and meanscontrolled in accordance with the supply-circuit voltage adapted toaccomplish a further regulation of said machine, of vibratory means forextending the range of operation of said regulating means.

29. The combination with a supply circuit having connected thereto adynamo-electric machine to be regulated having an armature and afield-magnet winding, means controlled in accordance with the potentialof the field-magnet winding for accomplishing the preliminary regulationof said machine and vibratory means controlled in accordance withsupply-circuitvoltage adapted to accomplish a further regulation of saidmachine, of means controlled by said vibratory means for extending therange of operation of the regulators.

30. The combination with a supply circuit having connected thereto adynamo-electric machine to be regulated having means assojciatedtherewith for accomplishing a prefurther regulation of said machine, ofvibratory means controlled by said second regulating means forcontrolling said resistor to extend the range of operation 0t both ofsaid regulating means.

31. The combination with a supply circuit having connected thereto adynamo-electric machine to be regulated having an armature and afield-magnet winding, means controlled in accordance with the potentialof the field-magnet windingfor accomplishing the preliminary regulationof said machine, said means comprising an electroresponsive devicehaving a resistor in circuit therewith,

and second means controlled in accordance with supply-circuit voltageadapted to accomplish a further regulation of said machine, of vibratorymeans controlled by said second regulatin means for controlling saidresistor to exten the range of operation of said regulating means.

32. The combination with a dynamo-electric machine to be regulatedhaving an armature and a field-magnet winding, an exciter generator incircuit with said field-magnet winding and a motor-operatedmheostat incircuit therewith, of electroresponsive means for controlling saidrheostat and vibiatory means for extending the range of operation ofsaid electroresponsive means.

33. The combination with a supply circuit having connected thereto adynamo-electric 34. The combination with a supply circuit havingconnected thereto a dynamo-electric machine to be regulated having anarmature and a field-magnet winding, means controlled in accordance withthe potential of the field-magnet winding for accomplishing thepreliminary regulation of said machine, said means comprising aneleclroresponsire device having a resistor in circuit therewith, andsecond means controlled in accordance with supply-circuit voltageadapted to ac-.

complish a further regulation of said "machine, of means controlled bysaid second regulating means for controlling said resistor to extend therange of operation of said first rcgnlatin means.

In testimony w iereof, I have hereunto subscribed my name this 23rd dayof March 1921.

JOHN H. ASHBAUGH.

